higher end shimano hyrdos are fine (although personally i prefer avid juicys) but I believe it was the deore ones that had problems last year, many of them had some problem i'm not exactly sure what it was but they where like overfilled and then they leaked out the caliper when you squeezed the brakes, which contaminated the pads. This made them sqeek horribly, it took forever to fix the problem, and on some of them it just couldn't be fixed, shimano ran out of brakes becuase so many people needed replacements. Now many of the bikes that had the cheepo hyros last year have either bb7s or juicy 3s.
I think that was the deores, just did a google image search, feel free to correct me if it was actually a lower model (do they even make a lower hydro?)
So yeah i'd get the bb7s, or if you want hydros spring for lx or juicy 3s